Pipe joint



Aug. 22, 1939. R. c. BOUGHTON PIPE JOINT Filed Sept. 7, 19:57

INVENTOR E0627 6 BOUGHTO/Y BY mzgluw n v N HH N Hi5 ATTORNEY Patented Aug 22, 1939 1 2,170,004 V PIP JOINT' jf j. Roger O QBoughtom San Francisco," Calif. l 7 Application September 7, 1937, Serial No. I f '5 Claim s. (01. 285-1177) I My invention relates to a coupling for joining A locking ring 9 isprovided at each end of pipes in a pipe line; andthe broad object of the sleeve for locking retaining rings 6 against the invention is to provide improved locking outward movement when the bolt frame is remeans for holding a gasket against an element moved, so that the gaskets are maintained under of the coupling. permanent pressure. These locking rings are ro- 5 The invention possesses other objects and featatably mounted on the sleeve, and have an intures of advantage, some of which, with the foreside diameter larger than the end diameter of going will be set forth in the following description the sleeve, whereby the rings may be slipped into of my invention. It is to be understood that I do assembled position over the ends of the sleeve.

10 not limit myself to this disclosure of species of Means are provided for holding the locking 10 my invention, as I may adopt variant embodirings in assembled position on the sleeve. For ments thereof within the scope of the claims. this purpose an annular groove l l is formed in Referring to the drawing: the peripheral portions of the sleeve, underlying Figure 1 of the drawing is a side view, partly flange 8 of the retaining ring. A series of fingers in section and partly in elevation, showing a cou- I2 on the end of the locking ring extend inwardly 15 pling embodying the improvements of my invento engage groove II and abut the shoulder l3 tion; and formed by the groove. These fingers form a Figure 2 is a fragmentary view showing a modserrated flange which securely holds the locking ified means for holding the locking ring. ring against outward movement, yet allows free In terms of broad inclusion, the pipe joint of rotation of the ring. 20 my invention comprises an annular element for Locking ring 9 is preferably of malleable iron,

encircling a pipe, a gasket adjacent an end of the and when the ring is formed the flange fingers element, a second annular element for encircling l2 extend straight out. Since the inside diam the pipe to apply pressure to the gasket, and a eter of ring 9 is larger than the diameter of shoullocking ring on the first element and engageable der [3, the ring is readily slipped inwardly over 25 with the second element for locking the elements the end of the sleeve. When in assembled potogether. The locking ring has an inside diamsition the fingers H are deformed or bent inwardeter larger than the end diameter of the first 1y to engage the groove. element, whereby the ring may be slipped into Suitable tapered lugs M are provided on looking I assembled position over the end of the first elering 9 for engaging inwardly extending and com- 30 ment, and means are provided for holding the plementary tapered lugs l6 projecting from the ring in assembled position. retaining ring. The latter ring may thus be In greater detail, and referring to the drawing, slipped inwardly over the lugs l4, and when the pipe joint comprises an annular coupling elering 9 is rotated to engage the lugs the retaining ment or sleeve 2 embracing the ends of pipes 3. ring is securely locked in position. In order to 35 A gasket 4 is provided at each end of sleeve 2, rotate the locking ring the portion of it which and the ends of the latter are preferably tapered projects out from under the retaining ring is proto form a conical seat for the complementary vided with sockets IT, with which a suitable tool formed gasket. By this arrangement the gasket may be engaged.

seals tightly against the end of the sleeve and at Figure 2 shows a modified holding means for 40 the same time is pressed firmly against the pipe the locking ring. In this case the locking ring when pressure is applied to the gasket. is assembled over the end of the sleeve, and a A second annular element or retaining ring 6 is split stop ring I8 is then snapped into a groove provided at each end of the sleeve for applying l9 provided in the sleeve. The ends of the split pressure to the gaskets. These retaining rings ring are then preferably welded together and to 45 are cup-shaped, having an inwardly extending the sleeve as indicated at 2|. flange l for engaging the gasket, and having an I claim: aXiaJly extending flange 8 overlying the end D 1. A pipe joint comprising an annular eletions of sleeve 2. The s ets a e preferably ment for encircling a pipe, a gasket adjacent an n tia y Subjected to pressure y means o a o t end of the element, a second annular element for 50 frame Such as Shown in y (JO-pending app1ica encircling the pipe to apply pressure to the gaso Serial With Such a, frame, ket, a locking ring on the first element and enother suitable m a s. th r ta n ri ss 6 are gageable with the second element for locking the drawn together over the ends of the sleeve to elements together, the inside diameter of the compress gaskets 4. ring being larger than the end diameter of the 55 on the first element and engageable with the a second element for locking the elements together,

and deformable holding means on the ring and bent inwardly to engage said groove.

3. A pipe joint comprising an annular element for encircling a pipe and having a peripheral shoulder, a gasket adjacent an endof the element, a second annular element for encircling the, pipe to apply pressure to the gasket, a locking ring on the first element and engageable with the second for locking the rings together, the inside diameter of the ring being larger than the diameter of said Shoulden and meansabutting the a shoulder for retaining the lookingwring. l;

4. A pipe joint comprising an annular element for encircling the pipe, a gasket adjacent an end of the element, a second annular element for encircling the pipe to apply pressure to the gasket, a locking ring on the first element and engageable with the second for locking the elements together, and a split stop ring on the first element for holding the locking ring.

5. A pipe joint comprising an annular element for encircling a pipe, a gasket adjacent an end of the element, a second annular element for encircling the pipe to compress the gasket, said second element overlapping the first, a turnable locking ring interposed between the overlapping surfaces of the elements for locking the latter together, theinside diameter of the locking ring being larger than the end diameter of the first element whereby the ring may be slipped into assembled position over the end of the first element, and means for holding the ring in assembled position; 7 ROGER C. BOUGHTON. 

